Either i'm not using correctly or when using the BDS selector i keep getting a null pointer
i'm using the selector like this:
Classifier classifier = new LogisticRegression();
DataTransform SFS = new BDS(20, classificationDataSet, classifier , 10 ); // error gets thrown here
classificationDataSet.applyTransform(SFS);
stack trace shows:
java.lang.NullPointerException
at jsat.classifiers.ClassificationDataSet.addDataPoint(ClassificationDataSet.java:342)
at jsat.classifiers.ClassificationDataSet.getSubset(ClassificationDataSet.java:234)
at jsat.classifiers.ClassificationDataSet.getSubset(ClassificationDataSet.java:20)
at jsat.DataSet.randomSplit(DataSet.java:488)
at jsat.DataSet.cvSet(DataSet.java:513)
at jsat.classifiers.ClassificationModelEvaluation.evaluateCrossValidation(ClassificationModelEvaluation.java:176)
at jsat.datatransform.featureselection.SFS.getScore(SFS.java:315)
at jsat.datatransform.featureselection.SFS.SFSSelectFeature(SFS.java:272)
at jsat.datatransform.featureselection.BDS.search(BDS.java:195)
at jsat.datatransform.featureselection.BDS.(BDS.java:83)
at backTester.BackTester.transform(BackTester.java:794)
at backTester.BackTester.getEventModel(BackTester.java:676)
at backTester.BackTester.runBackTest(BackTester.java:147)
at backTester.BackTester.main(BackTester.java:72)
jbax7635
commented
3 years ago
Either i'm not using correctly or when using the BDS selector i keep getting a null pointer
i'm using the selector like this:
Classifier classifier = new LogisticRegression();
DataTransform SFS = new BDS(20, classificationDataSet, classifier , 10 ); // error gets thrown here classificationDataSet.applyTransform(SFS);
stack trace shows:
java.lang.NullPointerException at jsat.classifiers.ClassificationDataSet.addDataPoint(ClassificationDataSet.java:342) at jsat.classifiers.ClassificationDataSet.getSubset(ClassificationDataSet.java:234) at jsat.classifiers.ClassificationDataSet.getSubset(ClassificationDataSet.java:20) at jsat.DataSet.randomSplit(DataSet.java:488) at jsat.DataSet.cvSet(DataSet.java:513) at jsat.classifiers.ClassificationModelEvaluation.evaluateCrossValidation(ClassificationModelEvaluation.java:176) at jsat.datatransform.featureselection.SFS.getScore(SFS.java:315) at jsat.datatransform.featureselection.SFS.SFSSelectFeature(SFS.java:272) at jsat.datatransform.featureselection.BDS.search(BDS.java:195) at jsat.datatransform.featureselection.BDS.(BDS.java:83)
at backTester.BackTester.transform(BackTester.java:794)
at backTester.BackTester.getEventModel(BackTester.java:676)
at backTester.BackTester.runBackTest(BackTester.java:147)
at backTester.BackTester.main(BackTester.java:72)
any help would be greatly appreciated